Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9834a1c60dab136…

MALICIOUS

PDF

80.8 KB Created: 2021-07-17 19:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2e85c2dba0b116abd8b4d1d8408db1d SHA-1: e747b287ed1a885d5b45f8e5e7b0e3d0ad640aef SHA-256: f9834a1c60dab136a594e5484e979b35a1b17f7b665b58a2b594c4ddfd0b1790
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a0cc2b561---rizitefonunakofi.pdf
    • http://hocikto.info/userfiles/file/rovupigibobaditula.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/nr3q317o99l2vi9aomn4ae0d74/wutoralina.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/tn5ot28d4tarqlo34hnbof109g/32931578456.pdf
    • http://palami.by/images/file/jefuramalinoxujunomol.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/597f27287a7d948464e4c0b86628937f/weketufugizinominebaxunug.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ff30dc48b.pdf
    • http://racecross.com/upload/edito_fckeditor/file/83886327767.pdf
    • http://uleshuzatshop.hu/files/file/sudovalepeminilivatolasa.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/cd1fd98c6089f3f45e60b2d135351527/domewaganazitujafotirigo.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081628dabd26---40409792274.pdf
    • https://bem-sa.com/img/file/fogexegeromipowevexozu.pdf
    • http://ohappy.org/userData/board/file/mopovamazizefebudexuloze.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/v3ncn8u4c924cfq3rusg2mu54r/delarud.pdf
    • http://ahchala.com/img/file/57287065973.pdf
    • https://fablab808.com/nbloom/fckuploads/file/97954147639.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca40c6e11---55023224063.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d58dfeb5adf186bb861a85a6b33dfbb0/91475764352.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/6c139ec4bfa0e0d41447f020dfd83c48/53290959035.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/3483cdf81cc0939e6f2d3c3bed80e4b6/kugasagadigozisu.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/sfm1flj65kuk96p3g84jvj18ed/35960829934.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/4kdsivfb8o1026q49f8ldrabf5/bapuzulesizi.pdf
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/fevifodinebabexavisosem.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/a9e04220eecea00064dc3faa01be4b4d/katitewovibixikoz.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3e065ab82---narusowuruvilupomimepisum.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+process+of+using+mrna+to+make+a+protein+is+called
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D1 16792 bytes
font_01_sfnt_off0000efe8.bin
a56b42e713b20ffd2959340c5dea2031e0604f02c00155c51322668fe4552ebf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE8 11220 bytes
font_02_sfnt_off000109d4.bin
96a4245a7da0d6d2f3b8c6d838f954e46a949510510c75dc4079a65f5c3b0855
pdf-font-stream PDF embedded font (sfnt) at offset 0x109D4 16772 bytes